Mounting controversy and alleged market manipulation has led Washington legislators to take a stronger look at major banks' hold over commodities, with the Fed to possibly reevaluate regulation in the coming months.

But for investors, the case for holding commodities as a strategic move is still clear, according to Goldman Sachs commodity strategist Jeffrey Currie.

Currie tells clients three reasons why: "1) commodities as a hedge against hostile markets amid rising geopolitical risks, 2) significant roll-yields on the back of the tightness in Cushing which will likely support backwardation in energy markets into the autumn, and 3) an increasing decline in correlations across returns, both within commodity markets and against other asset classes, making the case for commodities investments as a way to diversify portfolio risk."

In their latest Commodity Watch report, the analysts at Goldman provide forecasts and commentary for 25 major commodities.

We highlight 13 of those.

Brent Crude Oil

12-month price forecast:$105.00/bbl

Current price: $108.00

"In the absence of the current production shortfalls, particularly should the Libyan labor disputes be resolved, we expect the market to be amply supplied in 2H2013 as significant non-OPEC supply is expected to come online and recent weak Chinese trade data signals that demand remains relatively weak even as global growth continues to recover."

Source: Goldman Sachs, Bloomberg

RBOB Gasoline

12-month price forecast: $2.70/gal

Current price: $3.00/gal

"While the tightness in the RIN market remains an upside risk for RBOB prices, we expect the underlying gasoline fundamentals to remain under pressure in 2H13 and going into 2014 as OECD demand for gasoline continues to decline and we will likely need to see further refinery shutdowns in order to balance the market."

Source: Goldman Sachs, Bloomberg

NYMEX Natural Gas

12-month price forecast:$4.25/mmBtu

Current price: $3.70/mmBtu

"We believe... that the better than expected production growth is likely to be temporary as it is driven by debottlenecking of infrastructure with rig counts remaining at low levels. As a result, we continue to expect that prices will need to increase to $4.25/mmBtu as we move into 2014 to bring back rigs and keep the market balanced given the ongoing structural demand growth."